OK, I dug into this a bit. I added the line print("apt-listchanges arguments: ", str(sys.argv))
as the first line of main in apt-listchanges. Next time apticron was called, it produced this: --- apticron report [Tue, 27 Jun 2017 23:14:42 -0400] ======================================================================== apticron has detected that some packages need upgrading on: morannon.ln.benshome.net [ 172.17.113.244 ] The following packages are currently pending an upgrade: bsdutils 1:2.29-1ubuntu2.1 grub-legacy-ec2 0.7.9-153-g16a7302f-0ubuntu1~17.04.1 libblkid1 2.29-1ubuntu2.1 libfdisk1 2.29-1ubuntu2.1 libmount1 2.29-1ubuntu2.1 libnss-resolve 232-21ubuntu5 libpam-systemd 232-21ubuntu5 libsmartcols1 2.29-1ubuntu2.1 libsystemd0 232-21ubuntu5 libudev1 232-21ubuntu5 libuuid1 2.29-1ubuntu2.1 mount 2.29-1ubuntu2.1 nplan 0.23~17.04.1 systemd 232-21ubuntu5 systemd-sysv 232-21ubuntu5 udev 232-21ubuntu5 util-linux 2.29-1ubuntu2.1 uuid-runtime 2.29-1ubuntu2.1 ======================================================================== Package Details: Usage: apt-listchanges [options] {--apt | filename.deb ...} apt-listchanges arguments: ['/usr/bin/apt-listchanges', '--which=both', '--headers', '-f', 'text'] --- The problem appears to be that there are no .deb files provided (as all of the other arguments look valid). The execution of apt-listchanges is in line 225 of /usr/sbin/aptcron (on 17.10): /usr/bin/apt-listchanges --which=both --headers -f text $DEBS It would appear that $DEBS at this point is empty, rather than containing pathnames for the .debs to be listed. This would seem to point to a problem in lines 194 - 213, where DEBS is set. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1671922 Title: apticron calls apt-listchanges with incorrect arguments To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/apticron/+bug/1671922/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs